Raytheon 40KG6 Vacuum Tube NOS NIB Reprocessed Tubes Three and Four measured

Tubes Three and Four measured 73/70 and 75/72

They are microphonic and are fine in the preamp stage of my MP-301 and other gentle environments

The GEs are civilian and the National Union is milspec

48 and 51 where minimum (65%) is 32 and 100% is 49

Raytheon 40KG6 Vacuum Tube NOS NIB Reprocessed Tubes Three and Four measuredThis new old stock, new in box Raytheon 40KG6 tube tested to spec on our Paul Hart calibrated TV7 U. WE HAVE SCORES OF THOUSANDS OF VACUUM TUBES. IF IT'S NOT LISTED, WE MAY HAVE IT. PLEASE ALSO SEE OUT ETSY SISTER SITE "LOWTECHTWOO" AND OR CALL OR TEXT US AT 202 372 6931 IF YOU DO NOT SEE WHAT YOU NEED OR HAVE ANY QUESTIONS. 1. MOST FORMS OF SHIPPING EXCEPT MEDIA MAIL ARE AUTOMATICALLY INSURED UP TO $100. ETSY PURCHASE PROTECTION COVERS ITEMS UP TO